Facing extension host issue

Support Help
,
1 
I am facing this issue constantly. Kindly help in resolving it
Request ID: 0b815202-763c-408b-b5c3-b21cda1fc775
{“error”:“ERROR_CUSTOM”,“details”:{“title”:“Agent Execution Timed Out”,“detail”:“The agent execution provider did not respond in time. This may indicate the extension host is not running or is unresponsive.”,“isRetryable”:false,“shouldShowImmediateError”:true,“additionalInfo”:{},“buttons”:[{“label”:“Reload Window”,“reloadWindow”:{}}],“planChoices”:
}}
Agent Execution Timed Out [deadline_exceeded]
ConnectError: [deadline_exceeded] Agent Execution Timed Out
at vscode-file://vscode-app/c:/Users/adityave/AppData/Local/Programs/cursor/resources/app/out/vs/workbench/workbench.desktop.main.js:43803:12719
at async NJy.createExecInstance (vscode-file://vscode-app/c:/Users/adityave/AppData/Local/Programs/cursor/resources/app/out/vs/workbench/workbench.desktop.main.js:43803:10479)
at async mTA (vscode-file://vscode-app/c:/Users/adityave/AppData/Local/Programs/cursor/resources/app/out/vs/workbench/workbench.desktop.main.js:34060:582888)
at async IJ.execute (vscode-file://vscode-app/c:/Users/adityave/AppData/Local/Programs/cursor/resources/app/out/vs/workbench/workbench.desktop.main.js:34261:6603)
at async ARu.execute (vscode-file://vscode-app/c:/Users/adityave/AppData/Local/Programs/cursor/resources/app/out/vs/workbench/workbench.desktop.main.js:43803:1323)
at async oMw.execute (vscode-file://vscode-app/c:/Users/adityave/AppData/Local/Programs/cursor/resources/app/out/vs/workbench/workbench.desktop.main.js:46874:2775)
at async b5u.buildComposerRequestContext (vscode-file://vscode-app/c:/Users/adityave/AppData/Local/Programs/cursor/resources/app/out/vs/workbench/workbench.desktop.main.js:46884:3965)
at async b5u.streamFromAgentBackend (vscode-file://vscode-app/c:/Users/adityave/AppData/Local/Programs/cursor/resources/app/out/vs/workbench/workbench.desktop.main.js:46884:5603)
at async b5u.getAgentStreamResponse (vscode-file://vscode-app/c:/Users/adityave/AppData/Local/Programs/cursor/resources/app/out/vs/workbench/workbench.desktop.main.js:46884:13663)
at async vMe.submitChatMaybeAbortCurrent (vscode-file://vscode-app/c:/Users/adityave/AppData/Local/Programs/cursor/resources/app/out/vs/workbench/workbench.desktop.main.js:34327:17597)
at async Ea (vscode-file://vscode-app/c:/Users/adityave/AppData/Local/Programs/cursor/resources/app/out/vs/workbench/workbench.desktop.main.js:45811:4826)

Cursor Network Diagnostic Results

FAILED (4): Authentication UI, Cursor Tab, Agent Endpoint, Codebase Indexing

DNS: Running

SSL: Running

API: Not run

Ping: Not run

Chat: Not run

Agent: Not run

Marketplace: Success
Logs:
[2026-03-29T10:27:05.272Z] Host: marketplace.cursorapi.com
[2026-03-29T10:27:05.583Z] Response in 311ms
[2026-03-29T10:27:05.583Z] Response: 200
[2026-03-29T10:27:05.583Z] Response Type: cors
[2026-03-29T10:27:05.584Z] Server: null
[2026-03-29T10:27:05.584Z] Result: OK in 312ms

Authentication: Success
Logs:
[2026-03-29T10:27:05.293Z] Host: prod.authentication.cursor.sh
[2026-03-29T10:27:05.633Z] Response: 200  in 340ms

Authentication UI: Error: Timeout waiting for EverythingProvider
Logs:
[2026-03-29T10:27:09.136Z] Error: Error: Timeout waiting for EverythingProvider
[2026-03-29T10:27:10.402Z] Error: Error: Timeout waiting for EverythingProvider

Cursor Tab: Error: Timeout waiting for EverythingProvider
Logs:
[2026-03-29T10:27:09.159Z] Error: Error: Timeout waiting for EverythingProvider
[2026-03-29T10:27:10.445Z] Error: Error: Timeout waiting for EverythingProvider

Agent Endpoint: Error: Timeout waiting for EverythingProvider
Logs:
[2026-03-29T10:27:09.183Z] Error: Error: Timeout waiting for EverythingProvider
[2026-03-29T10:27:10.478Z] Error: Error: Timeout waiting for EverythingProvider

Codebase Indexing: Error: Timeout waiting for EverythingProvider
Logs:
[2026-03-29T10:27:09.209Z] Error: Error: Timeout waiting for EverythingProvider
[2026-03-29T10:27:10.502Z] Error: Error: Timeout waiting for EverythingProvider

Downloads: Success
Logs:
[2026-03-29T10:27:05.392Z] Host: downloads.cursor.com
[2026-03-29T10:27:05.759Z] Response: 403  in 367ms

CDN: Success
Logs:
[2026-03-29T10:27:05.422Z] Host: cursor-cdn.com
[2026-03-29T10:27:05.847Z] Response: 404  in 425ms
4

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5

Thanks for reaching out! Can you try these troubleshooting steps:

  1. In Cursor settings, search for `HTTP compatibility mode` and switch from HTTP/2 to HTTP/1.1 or 1. Then close and re-open Cursor.
  2. Open the Command Pallette (Ctrl-Shift-P) and choose “Developer: Reload with Extensions Disabled”
  3. Finally, if you’re using a VPN can you toggle it on/off and try again?

Let me know if this doesn’t work and I will follow up with additional steps.

8

Hi @kevinn Thanks for responding,
i followed the workaround but i still face the issue intermittently, most of the time its not accessible if it gets connected rarely the issue is still faced in new window. Thanks

9

Hi @Aditya_Verma Just checking back on this. Are you still facing the same issue? If so, can you confirm which HTTP compatibility mode you have set ?